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Finding the Fourth Proportional to 1,867.04, 2,798.51 and 770.81

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Solution

The fourth proportional to 1,867.04, 2,798.51 and 770.81 is: 1,155.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,867.04 : 2,798.51 = 770.81 : x
  2. Step 2: Convert to fraction form
    1,867.04/2,798.51 = 770.81/x
  3. Step 3: Cross multiply
    1,867.04x = 2,798.51 × 770.81
  4. Step 4: Simplify right side
    1,867.04x = 2,157,119.49
  5. Step 5: Solve for x
    x = 2,157,119.49/1,867.04
  6. Step 6: Final answer
    x = 1,155.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.